The horizon and absorbing materials are the key words here.
The earth isn't flat, it happens to be round, making the best place for a ships captain to be at at war is below the horizon for the enemy radars. When his ship is partly above the horizon the usage of absorbing composite materials comes in handy to absorbe the radar signals and to not return them to the radar screen of the enemy. Some energy will be returned but it will be hard to make a good signature out of it.
Red Storm Rising on the C=64 can be higher learning
